Since we're talking about ME4, I'll point out that they've talked a lot about exploration, the Mako is back, and it doesn't have a gun. it's looking like DA I in space. Not streamlined, but so far the other way as to suffer from Skyrim-ism
Ok it seems people are missing the point, just what do you think I am getting at here? Do you think I am trying to say that leveling up mechanics should be removed from all and every game to ever exist or do you honestly believe that all and every game needs a leveling up mechanic no matter how little it actually adds to the game?
Leveling up mechanics are good when done properly however it seems now days most game designers don't seem to know how to implement them or why they are even needed. All I am asking is that we take a step back and use those squishy pink things between our ears and re-evaluate the purpose behind such mechanics.
Look at Mass Effect 2 and tell me what purpose does the leveling up mechanic serve? It is certainly not a representation of character growth nor does increasing the power level of Shepard have a noticable effect on gameplay as the enemies level with you, don't you think the various skills and ammo types would have served better as equipment loadout options and weapon mods?
The purpose of a leveling mechanic is to emulate reality. In reality you do not simply have all the knowledge you'll ever have at birth. As you learn you gain knowledge, experience, and abilities. The leveling mechanic is designed to emulate this.
Thus, I can say it would be VALID in just about every game out there. I'm not sure it's a good idea for every game, but it's VALID.
As for ME2, on ammo types I'd agree with you, that's silly that they're tied to leveling. However, learning new abilities with experience (and having to specialize them in the end) is a good idea I think.